CA-NV AWWA Water Use Efficiency Grade1
-200 Practice Exam Questions & Answers
Study Guide Detailed Explanations (2026
Edition) pdf
Overview
The Water Use Efficiency Grade 1 certification is an entry-level
professional credential provided by the California-Nevada Section of
the American Water Works Association (AWWA). It is designed for
individuals working in water conservation, public works, or landscape
management. The exam focuses on the fundamentals of water
savings, residential auditing, irrigation technology, and public
education.
Key Features
Target Audience: Conservation coordinators, meter technicians, and
landscape auditors.
Major Domains: Landscape Irrigation (30%), Indoor Fixtures (20%),
Water Auditing (25%), and Public Relations/Policy (25%).
1. What is the primary mission of the AWWA?
A) To manage international oil prices.
B) To provide solutions to effectively manage water, the world’s most
important resource.
C) To build dams for electricity.
D) To regulate the bottled water industry.
Answer: B
Rationale: The American Water Works Association (AWWA) is the
,largest nonprofit, scientific, and educational association dedicated to
managing and treating water.
2. Which of the following is an example of "Outdoor" water use?
A) Flushing a toilet.
B) Using a dishwasher.
C) Watering a lawn with a sprinkler system.
D) Taking a five-minute shower.
Answer: C
Rationale: Outdoor water use typically refers to landscape irrigation,
pool filling, and car washing.
3. What is the maximum flow rate allowed for a "High-Efficiency"
(HE) toilet under current California standards?
A) 1.6 gpf
B) 1.28 gpf
C) 3.5 gpf
D) 0.5 gpf
Answer: B
Rationale: High-Efficiency Toilets (HET) are rated at 1.28 gallons per
flush (gpf) or less to save significant indoor water.
4. "Transpiration" is the process where:
A) Water evaporates from the soil.
B) Water is absorbed through the leaves from the air.
C) Water vapor is released through the pores (stomata) of a plant’s
leaves.
D) Water turns into ice.
Answer: C
Rationale: Transpiration is "plant sweat" and is a major component of
the Evapotranspiration (ET) equation.
5. How many gallons are in 1 "Acre-Foot" of water?
A) 748 gallons
B) 325,851 gallons
C) 1,000,000 gallons
D) 43,560 gallons
Answer: B
Rationale: An acre-foot is the volume of water required to cover one
,acre of land to a depth of one foot; it is a standard unit for large-scale
water management.
6. A "Pressure Vacuum Breaker" (PVB) is used in irrigation to:
A) Increase the water pressure.
B) Prevent backflow of contaminated water into the potable water
supply.
C) Filter the water.
D) Stop the water from freezing.
Answer: B
Rationale: Backflow prevention is a critical safety requirement for all
irrigation systems connected to drinking water.
7. Which soil type has the fastest "Infiltration Rate"?
A) Clay
B) Silt
C) Sand
D) Loam
Answer: C
Rationale: Sandy soil has large particles and large pore spaces,
allowing water to soak in quickly.
8. "Hydrozoning" helps conserve water by:
A) Installing only rocks in the yard.
B) Grouping plants with similar water and sun requirements together.
C) Watering the lawn every day at noon.
D) Using the same sprinkler for all plants.
Answer: B
Rationale: Hydrozoning prevents overwatering drought-tolerant plants
while underwatering high-water-use plants.
9. A "Low-Flow" showerhead is typically rated at _____ or less.
A) 1.0 gpm
B) 2.5 gpm (current federal standard is 2.5, but conservation aims for
lower)
C) 5.0 gpm
D) 10.0 gpm
Answer: B
, Rationale: Standard conservation showerheads are 2.5 gpm, though
many high-efficiency models are now 1.5 to 2.0 gpm.
10. What is the primary benefit of "Xeriscape"?
A) It makes the yard look like a desert.
B) It reduces the need for supplemental irrigation through water-
efficient design.
C) It allows for more swimming pools.
D) It uses more fertilizer.
Answer: B
Rationale: Xeriscaping is a set of 7 principles for quality landscaping
that uses less water.
11. A "Soil Moisture Sensor" (SMS) measures:
A) The temperature of the dirt.
B) The volumetric water content in the soil to help determine when to
irrigate.
C) The height of the grass.
D) The amount of rain that fell.
Answer: B
Rationale: SMS devices override the controller if the soil is already wet
enough, preventing unnecessary watering.
12. The term "Precipitation Rate" refers to:
A) How fast the wind is blowing.
B) The speed at which a sprinkler applies water to a given area,
usually in inches per hour.
C) The number of rainy days per year.
D) The depth of the water table.
Answer: B
Rationale: Knowing the PR helps a technician set the correct run time
on the irrigation controller.
13. "Point-Source" pollution comes from:
A) A single, identifiable source like a factory discharge pipe.
B) Runoff from a neighborhood.
C) Smoke in the air.
D) Rainwater.
Answer: A
-200 Practice Exam Questions & Answers
Study Guide Detailed Explanations (2026
Edition) pdf
Overview
The Water Use Efficiency Grade 1 certification is an entry-level
professional credential provided by the California-Nevada Section of
the American Water Works Association (AWWA). It is designed for
individuals working in water conservation, public works, or landscape
management. The exam focuses on the fundamentals of water
savings, residential auditing, irrigation technology, and public
education.
Key Features
Target Audience: Conservation coordinators, meter technicians, and
landscape auditors.
Major Domains: Landscape Irrigation (30%), Indoor Fixtures (20%),
Water Auditing (25%), and Public Relations/Policy (25%).
1. What is the primary mission of the AWWA?
A) To manage international oil prices.
B) To provide solutions to effectively manage water, the world’s most
important resource.
C) To build dams for electricity.
D) To regulate the bottled water industry.
Answer: B
Rationale: The American Water Works Association (AWWA) is the
,largest nonprofit, scientific, and educational association dedicated to
managing and treating water.
2. Which of the following is an example of "Outdoor" water use?
A) Flushing a toilet.
B) Using a dishwasher.
C) Watering a lawn with a sprinkler system.
D) Taking a five-minute shower.
Answer: C
Rationale: Outdoor water use typically refers to landscape irrigation,
pool filling, and car washing.
3. What is the maximum flow rate allowed for a "High-Efficiency"
(HE) toilet under current California standards?
A) 1.6 gpf
B) 1.28 gpf
C) 3.5 gpf
D) 0.5 gpf
Answer: B
Rationale: High-Efficiency Toilets (HET) are rated at 1.28 gallons per
flush (gpf) or less to save significant indoor water.
4. "Transpiration" is the process where:
A) Water evaporates from the soil.
B) Water is absorbed through the leaves from the air.
C) Water vapor is released through the pores (stomata) of a plant’s
leaves.
D) Water turns into ice.
Answer: C
Rationale: Transpiration is "plant sweat" and is a major component of
the Evapotranspiration (ET) equation.
5. How many gallons are in 1 "Acre-Foot" of water?
A) 748 gallons
B) 325,851 gallons
C) 1,000,000 gallons
D) 43,560 gallons
Answer: B
Rationale: An acre-foot is the volume of water required to cover one
,acre of land to a depth of one foot; it is a standard unit for large-scale
water management.
6. A "Pressure Vacuum Breaker" (PVB) is used in irrigation to:
A) Increase the water pressure.
B) Prevent backflow of contaminated water into the potable water
supply.
C) Filter the water.
D) Stop the water from freezing.
Answer: B
Rationale: Backflow prevention is a critical safety requirement for all
irrigation systems connected to drinking water.
7. Which soil type has the fastest "Infiltration Rate"?
A) Clay
B) Silt
C) Sand
D) Loam
Answer: C
Rationale: Sandy soil has large particles and large pore spaces,
allowing water to soak in quickly.
8. "Hydrozoning" helps conserve water by:
A) Installing only rocks in the yard.
B) Grouping plants with similar water and sun requirements together.
C) Watering the lawn every day at noon.
D) Using the same sprinkler for all plants.
Answer: B
Rationale: Hydrozoning prevents overwatering drought-tolerant plants
while underwatering high-water-use plants.
9. A "Low-Flow" showerhead is typically rated at _____ or less.
A) 1.0 gpm
B) 2.5 gpm (current federal standard is 2.5, but conservation aims for
lower)
C) 5.0 gpm
D) 10.0 gpm
Answer: B
, Rationale: Standard conservation showerheads are 2.5 gpm, though
many high-efficiency models are now 1.5 to 2.0 gpm.
10. What is the primary benefit of "Xeriscape"?
A) It makes the yard look like a desert.
B) It reduces the need for supplemental irrigation through water-
efficient design.
C) It allows for more swimming pools.
D) It uses more fertilizer.
Answer: B
Rationale: Xeriscaping is a set of 7 principles for quality landscaping
that uses less water.
11. A "Soil Moisture Sensor" (SMS) measures:
A) The temperature of the dirt.
B) The volumetric water content in the soil to help determine when to
irrigate.
C) The height of the grass.
D) The amount of rain that fell.
Answer: B
Rationale: SMS devices override the controller if the soil is already wet
enough, preventing unnecessary watering.
12. The term "Precipitation Rate" refers to:
A) How fast the wind is blowing.
B) The speed at which a sprinkler applies water to a given area,
usually in inches per hour.
C) The number of rainy days per year.
D) The depth of the water table.
Answer: B
Rationale: Knowing the PR helps a technician set the correct run time
on the irrigation controller.
13. "Point-Source" pollution comes from:
A) A single, identifiable source like a factory discharge pipe.
B) Runoff from a neighborhood.
C) Smoke in the air.
D) Rainwater.
Answer: A
